WO2013029544A1 - 光纤现场热熔快速连接器 - Google Patents

光纤现场热熔快速连接器 Download PDF

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Publication number
WO2013029544A1
WO2013029544A1 PCT/CN2012/080725 CN2012080725W WO2013029544A1 WO 2013029544 A1 WO2013029544 A1 WO 2013029544A1 CN 2012080725 W CN2012080725 W CN 2012080725W WO 2013029544 A1 WO2013029544 A1 WO 2013029544A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
ring
tail
quick connector
protection tube
Prior art date
Application number
PCT/CN2012/080725
Other languages
English (en)
French (fr)
Inventor
郭建民
魏杰
Original Assignee
深圳市特发信息光网科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市特发信息光网科技股份有限公司 filed Critical 深圳市特发信息光网科技股份有限公司
Priority to US13/822,683 priority Critical patent/US9158076B2/en
Priority to SG2013053301A priority patent/SG191937A1/en
Publication of WO2013029544A1 publication Critical patent/WO2013029544A1/zh

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3846Details of mounting fibres in ferrules; Assembly methods; Manufacture with fibre stubs
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/381Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3826Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres characterised by form or shape
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3887Anchoring optical cables to connector housings, e.g. strain relief features
    • G02B6/3888Protection from over-extension or over-compression
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/255Splicing of light guides, e.g. by fusion or bonding
    • G02B6/2558Reinforcement of splice joint
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/381Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3818Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
    • G02B6/3821Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with axial spring biasing or loading means

Definitions

  • BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to fiber optic transmission equipment, and more particularly to the design of anti-bending and tensile capabilities of fiber optic quick connectors. BACKGROUND OF THE INVENTION
  • optical fiber quick connectors generally adopt multiple fixing methods. Although the fixing method protects the safety problem of the optical fiber during the pulling process and improves the tensile strength, the ferrule docking is also generated. At the time of the spring compression, the ferrule is retracted, and the optical fiber is bent due to the inability to retreat, resulting in a new problem of large loss.
  • the present invention adopts an optical fiber on-site hot-melt quick connector structure to protect the fusion point of the optical fiber inside the tail sleeve, and solves the technical problem that an optical fiber protection disk needs to be independent of the optical fiber fusion.
  • the optical fiber field hot melt quick connector provided by the present invention for solving the above technical problem includes a plug portion, a crimping protection tail handle and a pressure ring, and the plug portion includes a plug housing and is disposed in the plug housing.
  • the crimping protection tail handle is provided with an annular groove
  • the pressure ring is engaged in the annular groove
  • the plug portion further comprises a tail connected to the plug housing An end cover, the first end of the end cover is respectively provided with a first connecting end and a second connecting end, the first connecting end is connected with the plug housing, the second The connecting end is connected with a crimping protection tail shank
  • the inner hole of the plug housing is provided with a convex front retaining ring
  • the inner end hole of the tail end cover is provided with a convex rear retaining ring
  • the tube is coaxially fixedly connected, and the ceramic ferrule and at least a portion of the optical fiber telescopic protection tube are interposed between the front retaining ring and the rear retaining ring, and are axially movable, and the optical fiber telescopic protection tube and the rear retaining
  • a further improvement of the present invention is that the fiber telescopic protection tube and the ceramic ferrule connection end are provided with a limit gear protruding from the outer surface thereof, the maximum diameter of the limit gear is larger than the inner diameter of the front stop ring, and the return spring
  • the inner hole of the plug housing is a stepped hole, and the step between the two holes is a front retaining ring.
  • the optical fiber telescopic protection tube is disposed between the limiting gear and the rear retaining ring.
  • a further improvement of the present invention is that the quick connector further includes a fusion splice protection tube, the heat-shrinkable fusion splice protection tube is disposed in the middle hole of the crimping protection tail handle, and the tail end of the optical fiber telescopic protection tube An annular rough surface is disposed on the end, and one end of the heat-shrinkable fusion-point protection tube is heat-shrinked and sleeved and fixed on the rough surface.
  • the quick connector also includes a tail sleeve that fits over the crimp protection tail and the pressure ring.
  • the optical fiber quick connector of the invention has a certain movable space in the axial direction.
  • DRAWINGS 1 is an exploded perspective view of an optical fiber field hot melt quick connector of the present invention.
  • the fiber optic field hot melt quick connector includes a plug portion 10, a crimp protection tail handle 20 and a pressure ring 30.
  • the plug portion 10 includes a plug housing 11 and is disposed on the plug housing.
  • the ceramic ferrule 12 and the optical fiber telescopic protection tube 13 are disposed on the crimping protection tail shank 20, and the pressure ring 30 is engaged in the annular groove 21, and the plug portion 10 is The end cover 14 is connected to the plug housing 11.
  • the two ends of the end cover 14 are respectively provided with a first connecting end 141 and a second connecting end 142.
  • the first connecting end 141 and the plug housing 11 are respectively provided.
  • the second connecting end 142 is connected to the crimping protection tail shank 20, the inner hole of the plug housing 11 is provided with a convex front retaining ring 111, and the inner end of the tail end cover 14 is provided with a convex rear
  • the retaining ring 143, the ceramic ferrule 12 is coaxially fixedly connected to the optical fiber telescopic protection tube 13, and the ceramic ferrule 12 and at least a portion of the optical fiber telescopic protection tube 13 are interposed between the front retaining ring 111 and the rear retaining ring 143. Between and can move axially.
  • a length 81 of two docking fibers is embedded in the inner hole of the plug portion 10, and the crimp protection tail handle 20 is used to protect the two pairs of optical solder.
  • the pressure ring 30 is mounted, another cable for docking the optical fiber 82 is used.
  • the sheath and the spun yarn 71 are fitted and fixed between the pressure ring 30 and the annular groove 21, and the butt fiber 82 is fixed by the pressure ring 30.
  • the tail end cover 14 connected to the plug housing 11 of the present invention constitutes a hollow space, and the ceramic ferrule 12 and the optical fiber telescopic protection tube 13 are disposed in the space, and the two ends of the space respectively have a front stop ring 111 and a rear stop ring 143 defines axial movement
  • the position of the ceramic ferrule 12 and the optical fiber telescopic protection tube 13 has a certain axial movable margin in the above space.
  • a return spring 15 is further disposed between the optical fiber telescopic protection tube 13 and the rear stop ring 143, and the connection end 131 of the optical fiber expansion protection tube 13 and the ceramic ferrule 12 is provided with a protrusion protruding from the outer surface thereof.
  • a limit position 132 the maximum diameter of the limit position 132 is larger than the inner diameter of the front stop ring 111, and the return spring 15 is sleeved on the optical fiber expansion protection tube 13 and between the limit position 132 and the rear stop ring 143 .
  • the front end movement limit of the optical fiber telescopic protection tube 13 and the ceramic ferrule 12 is realized by the limit position 132 and the front stop ring 111, so that the ceramic ferrule 12 is prevented from being pulled out from the front end, and the limit position 132 is also restored.
  • the spring seat of the spring 15 fixes one end of the return spring 15, and the other end of the return spring abuts against the rear stop ring 143, and the rear stop ring 143 limits the maximum distance of the optical fiber telescopic protection tube 13 in the axial direction of this end.
  • the inner hole of the plug housing 11 is a stepped hole, the step between the two holes is the front stop ring 111. As shown in FIG. 1 and FIG.
  • the quick connector further includes a fusion point protection tube 40, and the fusion point protection tube 40 is disposed in the middle hole of the crimp protection tail shank 20, and the fusion point protection tube 40 is preferably It is a heat shrinkable sleeve.
  • An end surface 133 of the optical fiber telescopic protection tube 13 is provided with an annular rough surface 134.
  • One end of the heat-shrinkable welding point protection tube 40 is heat-shrinked and sleeved and fixed on the rough surface 134.
  • the splice point protection tube 40 of the present invention is for fixing the two butt fibers 81 and 82, and the two butt fibers 81 and 82 are welded at the thermal melting point 70.
  • the quick connector further includes a tail sleeve 50 that fits over the crimp protection tail shank 20 and the pressure ring 30.
  • the tail sleeve 50 mainly protects the crimping protection tail shank 20 and the optical fiber inside thereof, and the tail sleeve is a rubber sleeve, which serves to buffer external impact, and at the same time, the sealing performance of the rubber sleeve is better.
  • the first connecting end 141 and the plug housing 11 and the second connecting end 142 are connected to the crimping protection tail shank 20 by screwing, snapping, crimping or bonding.
  • the quick connector further includes a lock ring 60, including a stop ring 62 protruding from the inner hole of the lock ring 60, and a stop ring 62-side disposed internal thread 61.
  • the ring 62 is caught between the second connection end 142 and the crimp protection tail shank 20.
  • the lock ring 60 mainly functions to fix the docking connector, the internal thread 61 is used to connect the docking connector, and the stop ring 62 is used to fix the connector. After the two connectors are docked, the lock is tightened. The ring 60 ensures that the two butt connectors are tightly connected and are not loose.

Abstract

一种光纤现场热熔快速连接器,包括插头壳体(11)、陶瓷插芯(12)、光纤伸缩保护管(13)、尾端盖(14)、压接保护尾柄(20)以及压环(30)。压接保护尾柄(20)上设置环形凹槽(21),压环(30)卡接于环形凹槽(21)内。插头壳体(11)内设前挡环(111),尾端盖(14)内设后挡环(143)。陶瓷插芯(12)和光纤伸缩保护管(13)介于前挡环(111)与后挡环(143)之间,并可轴向移动。该光纤快速接头在轴向上具有一定的活动余地,在光纤对接时,光纤本身可以随插接的动作而活动,避免因无法活动而弯曲的问题出现,保护光信号的传输质量和光纤快速接头的使用寿命。

Description

光纤现场热熔快速连接器
技术领域 本发明涉及光纤传输设备,特别涉及光纤快速接头的防弯折和抗 拉能力的设计。 背景技术 现有技术中光纤快速接头一般都是采用多重固定的方式,这种固 定方式虽然保护了光纤在在牵拉过程中的安全问题,提高了抗拉能力, 但是, 也产生了插芯对接时, 由于弹簧压缩, 使插芯后退, 光纤因不 能后退导致弯曲, 产生损耗变大的新问题。 发明内容 本发明采用光纤现场热熔快速连接器结构,将光纤的熔接点保护 在尾套内部, 解决了光纤熔接需要独立的一个光纤保护盘技术问题。 本发明为解决上述技术问题而提供的这种一种光纤现场热熔快 速连接器, 包括插头部、压接保护尾柄以及压环, 所述插头部包括插 头壳体、设置于插头壳体内的陶瓷插芯和光纤伸缩保护管, 所述压接 保护尾柄上设置环形凹槽, 所述压环卡接于所述环形凹槽内, 所述插 头部还包括有与插头壳体连接的尾端盖,该尾端盖的两端分别设有第 一连接端和第二连接端, 所述第一连接端与插头壳体连接, 所述第二 连接端连接压接保护尾柄, 所述插头壳体内孔设有凸起的前挡环, 所 述尾端盖内孔中设有凸起的后挡环,所述陶瓷插芯与光纤伸缩保护管 同轴固定连接,所述陶瓷插芯以及至少部分的光纤伸缩保护管介于所 述前挡环与后挡环之间, 并可轴向移动, 所述光纤伸缩保护管与后挡 环之间还设置有复原弹簧。 本发明的进一步改进在于:所述光纤伸缩保护管与陶瓷插芯连接 端设有突出于其外表面的限位档,该限位档最大直径大于所述前挡环 的内径, 所述复原弹簧套在光纤伸缩保护管上, 并介于限位档和后挡 环之间, 所述插头壳体的内孔为台阶状的孔, 其两段孔之间的台阶为 前挡环。 本发明的再进一步改进在于:该快速连接器还包括熔接点保护管, 所述热缩的熔接点保护管设置于所述压接保护尾柄的中孔内,所述光 纤伸缩保护管的尾端上设有环形的粗糙面,所述热缩型熔接点保护管 的一端热缩后套接固定在该粗糙面上。该快速连接器还包括尾套, 该 尾套套装在所述压接保护尾柄和压环的外面。 本发明的光纤快速接头在轴向上具有一定的活动余地,在光纤对 接时, 光纤本身可以随插接的动作而活动, 避免因无法活动而弯曲的 问题出现, 保证光信号的传输质量, 同时, 也保证这种光纤快速连接 器的使用寿命。 附图说明 图 1是本发明光纤现场热熔快速连接器的分解示意图。
图 2是本发明光纤现场热熔快速连接器的剖视示意图。 具体实施方式 结合上述附图说明本发明的具体实施例。 由图 1和图 2中可知,这种光纤现场热熔快速连接器包括插头部 10、压接保护尾柄 20以及压环 30,所述插头部 10包括插头壳体 11、 设置于插头壳体 11 内的陶瓷插芯 12和光纤伸缩保护管 13, 所述压 接保护尾柄 20上设置环形凹槽 21, 所述压环 30卡接于所述环形凹 槽 21 内, 所述插头部 10还包括有与插头壳体 11连接的尾端盖 14, 该尾端盖 14的两端分别设有第一连接端 141和第二连接端 142, 所 述第一连接端 141与插头壳体 11连接, 所述第二连接端 142连接压 接保护尾柄 20, 所述插头壳体 11内孔设有凸起的前挡环 111, 所述 尾端盖 14内孔中设有凸起的后挡环 143, 所述陶瓷插芯 12与光纤伸 缩保护管 13同轴固定连接,所述陶瓷插芯 12以及至少部分的光纤伸 缩保护管 13介于所述前挡环 111与后挡环 143之间,并可轴向移动。 本发明中两个对接光纤的一段 81嵌装在插头部 10的内孔中,压接保 护尾柄 20用于保护两对接光钎, 在安装压环 30时, 将另一段对接光 纤 82的缆皮以及纺纶丝 71嵌装固定在压环 30和环形凹槽 21之间, 用压环 30固定对接光纤 82。 本发明中的插头壳体 11连接的尾端盖 14构成一个中空的空间, 陶瓷插芯 12与光纤伸缩保护管 13设置在 该空间内,该空间两端分别有前挡环 111和后挡环 143限定轴向移动 的位置,陶瓷插芯 12与光纤伸缩保护管 13在上述空间内具有一定的 轴向活动余量, 当插芯对接时, 陶瓷插芯 12后退, 光纤伸缩保护管 13 也可以随插芯同步后退, 因此光纤不会因为不能后退而弯曲或压 缩光纤, 保证了光传输的效率。 同时, 也保证在插拔试验过程中, 满 足试验的标准要求。 由图 2中可知, 所述光纤伸缩保护管 13与后挡环 143之间还设 置有复原弹簧 15,所述光纤伸缩保护管 13与陶瓷插芯 12连接端 131 设有突出于其外表面的限位档 132, 该限位档 132最大直径大于所述 前挡环 111的内径, 所述复原弹簧 15套在光纤伸缩保护管 13上, 并 介于限位档 132和后挡环 143之间。 本发明中光纤伸缩保护管 13与 陶瓷插芯 12的前端移动限位依靠限位档 132和前挡环 111来实现, 避免陶瓷插芯 12从前端窜出, 同时, 限位档 132还作为复原弹簧 15 的弹簧座, 固定复原弹簧 15的一端, 复原弹簧的另外一端抵在后挡 环 143上, 由后挡环 143限位光纤伸缩保护管 13在这一端的轴向移 动最大距离。 在所述插头壳体 11的内孔为台阶状的孔时, 其两段孔 之间的台阶为前挡环 111。 由图 1和图 2中可知, 该快速连接器还包括熔接点保护管 40, 所述熔接点保护管 40设置于所述压接保护尾柄 20的中孔内,该熔接 点保护管 40优选为热缩套管。所述光纤伸缩保护管 13的尾端 133上 设有环形的粗糙面 134, 所述热缩型熔接点保护管 40的一端热缩后 套接固定在该粗糙面 134上。 本发明中的熔接点保护管 40是用于固 定两对接光纤 81和 82的, 两对接光纤 81和 82在热熔点 70处熔接 后, 其轴向定位牵拉保护则依赖于熔接点保护管 40。 熔接点保护管 40一端热缩后固定在对接光纤 82上, 另外一端热缩后套在光纤伸缩 保护管 13的尾端 133上, 当光纤受到牵拉作用时, 牵拉力主要由熔 接点保护管 40承担。 由图 1和图 2中可知, 该快速连接器还包括尾套 50, 该尾套 50 套装在所述压接保护尾柄 20和压环 30的外面。 该尾套 50主要是保 护压接保护尾柄 20以及其内部的光纤, 尾套为胶套, 起到缓冲外部 冲击的作用, 同时, 这种胶套的密封性能更好。 所述第一连接端 141与插头壳体 11以及第二连接端 142与压接 保护尾柄 20的连接方式为螺紋连接、 卡接、 压接或者粘接方式。 由图 1和图 2中可知, 该快速连接器还包括锁环 60, 包括凸设 于该锁环 60内孔的止档环 62以及止档环 62—侧设置的内螺紋 61所 述止档环 62卡在第二连接端 142与压接保护尾柄 20之间。本发明中 锁环 60主要是起到与对接连接器固定的作用,内螺紋 61用于连接对 接的连接器, 而止档环 62则用于固定本连接器, 两连接器对接后, 拧紧锁环 60, 从而保证两对接的连接器连接紧密, 不松脱。 以上内容是结合具体的优选实施方式对本发明所作的进一步详 细说明, 不能认定本发明的具体实施只局限于这些说明。对于本发明 所属技术领域的普通技术人员来说, 在不脱离本发明构思的前提下, 还可以做出若干简单推演或替换,都应当视为属于本发明的保护范围。

Claims

权利要求书
1. 一种光纤现场热熔快速连接器, 包括插头部(10)、 压接保护尾柄
(20) 以及压环 (30), 所述插头部 (10) 包括插头壳体 (11)、 设置于插头壳体( 11 )内的陶瓷插芯( 12 )和光纤伸缩保护管( 13 ), 所述压接保护尾柄 (20) 上设置环形凹槽 (21), 所述压环 (30) 卡接于所述环形凹槽 (21) 内, 其特征在于: 所述插头部 (10) 还包括有与插头壳体 (11) 连接的尾端盖 (14), 该尾端盖 (14) 的两端分别设有第一连接端(141)和第二连接端(142), 所述第 一连接端(141)与插头壳体(11)连接, 所述第二连接端(142) 连接压接保护尾柄(20), 所述插头壳体(11) 内孔设有凸起的前 挡环(111), 所述尾端盖(14)内孔中设有凸起的后挡环(143), 所述陶瓷插芯 (12) 与光纤伸缩保护管 (13) 同轴固定连接, 所 述陶瓷插芯 (12) 以及至少部分的光纤伸缩保护管 (13) 介于所 述前挡环 (111) 与后挡环 (143) 之间, 并可轴向移动。
2. 根据权利要求 1所述光纤现场热熔快速连接器, 其特征在于: 所 述光纤伸缩保护管(13)与后挡环(143)之间还设置有复原弹簧
(15)。
3. 根据权利要求 2所述光纤现场热熔快速连接器, 其特征在于: 所 述光纤伸缩保护管 (13) 与陶瓷插芯 (12)连接端 (131) 设有突 出于其外表面的限位档 (132), 该限位档 (132)最大直径大于所 述前挡环 (111) 的内径, 所述复原弹簧(15)套在光纤伸缩保护 管 (13) 上, 并介于限位档 (132) 和后挡环 (143) 之间。
4. 根据权利要求 1至 3中任一项所述光纤现场热熔快速连接器, 其 特征在于: 所述插头壳体 (11) 的内孔为台阶状的孔, 其两段孔 之间的台阶为前挡环 (111)。
5. 根据权利要求 1至 3中任一项所述光纤现场热熔快速连接器, 其 特征在于: 该快速连接器还包括熔接点保护管(40), 所述熔接点 保护管 (40) 设置于所述压接保护尾柄 (20) 的中孔内。
6. 根据权利要求 5所述光纤现场热熔快速连接器, 其特征在于: 所 述熔接点保护管 (40) 为热缩套管。
7. 根据权利要求 6所述光纤现场热熔快速连接器, 其特征在于: 所 述光纤伸缩保护管(13)的尾端(133)上设有环形的粗糙面(134), 所述热缩型熔接点保护管 (40) 的一端热缩后套接固定在该粗糙 面 (134) 上。
8. 根据权利要求 1至 3中任一项所述光纤现场热熔快速连接器, 其 特征在于: 该快速连接器还包括尾套 (50), 该尾套(50)套装在 所述压接保护尾柄 (20) 和压环 (30) 的外面。
9. 根据权利要求 1至 3中任一项所述光纤现场热熔快速连接器, 其 特征在于: 所述第一连接端(141)与插头壳体(11) 以及第二连 接端(142)与压接保护尾柄(20)的连接方式为螺紋连接、卡接、 压接或者粘接方式。 根据权利要求 1至 3中任一项所述光纤现场热熔快速连接器, 其 特征在于:该快速连接器还包括锁环(60),包括凸设于该锁环(60) 内孔的止档环 (62) 以及止档环 (62) —侧设置的内螺紋 (61) 所述止档环 (62) 卡在第二连接端 (142) 与压接保护尾柄 (20) 之间。
PCT/CN2012/080725 2011-08-29 2012-08-29 光纤现场热熔快速连接器 WO2013029544A1 (zh)

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